Cube of aquarium



FIG. 1 is a top, front, right perspective view of a cube of aquarium showing our new design;

FIG. 2 is a top, rear, left perspective view thereof;

FIG. 3 is a front plan view thereof;

FIG. 4 is a rear plan view thereof;

FIG. 5 is a left plan view thereof;

FIG. 6 is a right plan view thereof; and,

FIG. 7 is a top plan view thereof.

The broken lines in FIG. 4 are included for the purpose of illustrating portions of the article that form no part of the claimed design. 

CLAIM The ornamental design for a cube of aquarium, as shown and described. 